noun

a person who acts unwisely or imprudently; a silly person.

I felt a bit of a fool

idiot,halfwit,nincompoop,blockhead,buffoon,dunce,dolt,ignoramus,cretin,imbecile,dullard,moron,simpleton,clod,dope,ninny,chump,dimwit,nitwit,goon,dumbo,dummy,dum-dum,dumb-bell,loon,jackass,bonehead,fathead,numbskull,dunderhead,chucklehead,knucklehead,muttonhead,pudding-head,thickhead,wooden-head,airhead,pinhead,lamebrain,pea-brain,birdbrain,zombie,jerk,nerd,dipstick,donkey,noodle,nit,numpty,twit,clot,ass,goat,plonker,berk,prat,pillock,wally,git,wazzock,divvy,nerk,twerp,charlie,mug,muppet,nyaff,balloon,sumph,gowk,gobdaw,schmuck,bozo,boob,lamer,turkey,schlepper,chowderhead,dumbhead,dumbass,goofball,goof,goofus,galoot,dork,lummox,klutz,putz,schlemiel,sap,meatball,gink,cluck,clunk,ding-dong,dingbat,wiener,weeny,dip,simp,spud,coot,palooka,poop,squarehead,yo-yo,dingleberry,wing nut,drongo,dill,alec,galah,nong,bogan,poon,boofhead,mompara,tomfool,noddy,clodpole,loggerhead,spoony,mooncalf,knobhead,asshat

verb

trick or deceive (someone); dupe.

he fooled nightclub managers into believing he was a successful businessman

deceive,trick,play a trick on,hoax,dupe,take in,mislead,delude,hoodwink,bluff,beguile,gull,make a fool of,outwit,swindle,defraud,cheat,double-cross,con,bamboozle,pull a fast one on,pull someone’s leg,take for a ride,throw dust in someone’s eyes,put one over on,have on,diddle,rip off,do,sting,gyp,shaft,fiddle,swizzle,sell a pup to,sucker,snooker,stiff,euchre,bunco,hornswoggle,pull a swifty on,cozen,sharp,mulct

adjective

foolish; silly.

that damn fool waiter